[f-spot] Add copyright conversion tool.

[Ruben Vermeersch <rubenv src gnome org>]

commit 983ef438a9f157853bddf3f5fd80130ae9cf8b54
Author: Ruben Vermeersch <ruben savanne be>
Date:   Sat Oct 9 14:00:51 2010 +0200

    Add copyright conversion tool.

 tools/copyrightify.py |  158 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 158 insertions(+), 0 deletions(-)
---
diff --git a/tools/copyrightify.py b/tools/copyrightify.py
new file mode 100755
index 0000000..fceb291
--- /dev/null
+++ b/tools/copyrightify.py
@@ -0,0 +1,158 @@
+#!/usr/bin/env python
+
+# Small tool to add copyright headers, used in the GPL -> MIT X11 transition.
+#
+# TODO: Add support for updating the headers
+# TODO: Make sure the header isn't counted when figuring out contributors.
+
+import os
+import re
+import sys
+import subprocess
+
+license_block  = "//\n"
+license_block += "// @@FILENAME@@\n"
+license_block += "//\n"
+license_block += "// Author:\n"
+license_block += "@@AUTHORS@@"
+license_block += "//\n"
+license_block += "@@COPYRIGHTS@@"
+license_block += "//\n"
+license_block += "// Permission is hereby granted, free of charge, to any person obtaining\n"
+license_block += "// a copy of this software and associated documentation files (the\n"
+license_block += "// \"Software\"), to deal in the Software without restriction, including\n"
+license_block += "// without limitation the rights to use, copy, modify, merge, publish,\n"
+license_block += "// distribute, sublicense, and/or sell copies of the Software, and to\n"
+license_block += "// permit persons to whom the Software is furnished to do so, subject to\n"
+license_block += "// the following conditions:\n"
+license_block += "//\n"
+license_block += "// The above copyright notice and this permission notice shall be\n"
+license_block += "// included in all copies or substantial portions of the Software.\n"
+license_block += "//\n"
+license_block += "// THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND,\n"
+license_block += "// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n"
+license_block += "// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n"
+license_block += "// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\n"
+license_block += "// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\n"
+license_block += "// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\n"
+license_block += "// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
+license_block += "//\n"
+license_block += "\n"
+
+filename = sys.argv[1]
+
+f = open(filename, 'r')
+code = f.read()
+
+# Probe for headers
+has_header = code.find("without limitation the rights to use, copy, modify") != -1
+has_legacy_header = code.find("See COPYING") != -1
+
+print "## Processing " + filename
+
+if has_legacy_header:
+    print "File seems to contain an old header!"
+    sys.exit(255)
+
+if has_header:
+    print "Header seems to be already in place"
+    sys.exit(0)
+    
+# Gather some information
+
+blame_info = subprocess.Popen(["git", "blame", "--incremental", filename], stdout=subprocess.PIPE).communicate()[0]
+
+current_author_lines = 0
+current_author = ""
+total_lines = 0
+
+commit_authors = {}
+author_counts = {}
+author_details = {}
+author_years = {}
+
+for line in blame_info.split("\n"):
+    if not re.match("[0-9a-f]{40} ", line):
+        continue
+
+    [commit, a, b, lines] = line.split(" ")
+
+    if commit == '0000000000000000000000000000000000000000':
+        continue
+    
+    if not commit in commit_authors:
+        # Look up author
+        author_info = subprocess.Popen(["git", "show", "--pretty=format:%aD!%aN!%ae", commit], stdout=subprocess.PIPE).communicate()[0]
+        author_info = author_info.split("\n")[0]
+        [date, name, email] = author_info.split("!", 2)
+        year = date.split(" ")[3]
+
+        commit_authors[commit] = name
+
+        if not name in author_details:
+            author_details[name] = email
+        if not name in author_years:
+            author_years[name] = {}
+        if not name in author_counts:
+            author_counts[name] = 0
+        author_years[name][year] = 1
+
+    current_author = commit_authors[commit]
+    author_counts[current_author] += int(lines)
+    total_lines += int(lines)
+
+
+# Filter out small contributors (< 10% of the file)
+cutoff = total_lines / 10
+
+for k, v in author_counts.iteritems():
+    if int(v) <= cutoff:
+        del author_years[k]
+        del author_details[k]
+
+# Create author lines
+authors = ''
+for k, v in author_details.iteritems():
+    authors += "//   " + k + " <" + v + ">\n"
+
+# Create copyright lines
+copyrights = ''
+min_year = 0
+max_year = 0
+p = re.compile('(20[0-9]{2})-((20[0-9]{2})-)*', re.VERBOSE)
+for k, y in author_years.iteritems():
+    last_year = 0
+    line = "// Copyright (C) "
+    for v in sorted(y.keys()):
+        v = int(v)
+        if last_year == 0:
+            line += str(v)
+        elif last_year == v - 1:
+            line += "-" + str(v)
+        else:
+            line += ", " + str(v)
+        last_year = v
+        if min_year == 0 or v < min_year:
+            min_year = v
+        if v > max_year:
+            max_year = v
+    line = p.sub(r'\1-', line)
+    line += " " + k + "\n"
+    copyrights += line
+if min_year == max_year:
+    copyrights = "// Copyright (C) " + str(min_year) + " Novell, Inc.\n" + copyrights
+else:
+    copyrights = "// Copyright (C) " + str(min_year) + "-" + str(max_year) + " Novell, Inc.\n" + copyrights
+
+# Add it
+print "Adding header"
+
+license_text = license_block
+license_text = license_text.replace("@@FILENAME@@", filename.split("/")[-1])
+license_text = license_text.replace("@@AUTHORS@@", authors)
+license_text = license_text.replace("@@COPYRIGHTS@@", copyrights)
+
+tmp = open(filename, "w")
+tmp.write(license_text+code)
+tmp.close()
+